Finding the Fourth Proportional to 31,507.47, 47,260.72 and 12,787.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,507.47 : 47,260.72 = 12,787.42 : x
2. Step 2: Convert to fraction form
   31,507.47/47,260.72 = 12,787.42/x
3. Step 3: Cross multiply
   31,507.47x = 47,260.72 × 12,787.42
4. Step 4: Simplify right side
   31,507.47x = 604,342,676.14
5. Step 5: Solve for x
   x = 604,342,676.14/31,507.47
6. Step 6: Final answer
   x = 19,180.93